Enter a 10-digit HTS line, the country of origin and the entry date to see the base rate, 301 / 232 / 201 / 338 additional duties, AD/CVD deposits, PGA flags and other requirements, with a confirmed total and a maximum.
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On the note 52(b) general exemption list (exempt by HTS line; enter under 9903.05.86)
8-digit subheading 2804.61.00 is on FYR-SEMI
General (all other countries) | Silicon: containing by weight not less than 99.99 percent of silicon (polysilicon itself: MIP only, no 15% ad valorem)
may-be-required only · ACE valid to 2039-12-31
no entered value: rates and limits only
Period 2026-10-01 – 2027-09-30 · 91 FR 48398 (2026-07-31, Doc. 2026-15530, FY2027)
Chinese origin: the UFLPA presumption is triggered through the supply chain (Xinjiang inputs / Entity List), not by country of origin; the origins with the most CBP denials are MY / VN / TH.
Chinese origin + priority sector: prepare applicability-review / exception-request documentation | Statutory high-priority sector. Hoshine is listed under section (i), so Hoshine silicon at any tier triggers the presumption. Trace quartz → metallurgical silicon → polysilicon → ingot → wafer → cell → module.
Hoshine Silicon Industry Co. + subsidiaries | Superseded by the UFLPA process (handled under the presumption) | status: superseded-uflpa
File a positive TSCA certification (complies with all TSCA rules / orders) or a negative certification (pesticides / food / drugs / cosmetics / nuclear material) in ACE when importing chemical substances or mixtures. The EP7 flag is advisory only and the certification is the importer's responsibility. Finished articles are generally exempt unless a specific rule applies. PFAS: one-time reporting of PFAS and PFAS-containing articles imported since 2011.
2025–26: The PFAS reporting window is postponed to 2027-01-31 or 60 days after the final rule (2026-04-13); the 2025-11 proposal to exempt imported articles and ≤0.1% content is not final
Schedule 1: import only from States Parties, 45-day advance notice to BIS, annual report. Schedule 2: import from non-States Parties prohibited, annual report above thresholds. Schedule 3: annual report.
From 2026-09-22 to 12-03 Commerce, with CBP, monitors polysilicon and derivative imports by importer of record (aggregate and weekly average since 2026-08-06 vs the 2026-01-01 to 08-06 and 2025 weekly averages, and use of affiliates that do not customarily import or of new IORs). An IOR found stockpiling, once notified by CBP, may not enter such goods for consumption before 2026-12-04 (bonded warehouse allowed); IORs registered on or after 2026-08-06 are limited per week to 12 kg of 2804.61.00, 7 kg of 3818.00.0020/.0040/.0045/.0050/.0091, 2,000 units of 8541.42.00 and 55 units of 8541.43.00. Waivers may be requested from Polysilicon232@bis.doc.gov (form at bis.gov/232), Commerce responds within 14 days.
2025–26: Effective 2026-09-22 (temporary final rule, through 2026-12-03); the 232 tariff and minimum import prices (MIP) take effect 2026-12-04
Before arrival: Confirm the substance is on the TSCA Inventory / complies with §5 / §6 orders; identify negative-certification categories (pesticides, food, drugs, cosmetics, nuclear material)
At entry: TSCA positive / negative certification in the PGA message set (or paper / DIS), with the certifier's name, e-mail and phone
Disclaim: EP7: A, B (§13 only, not Title VI); EP8 cannot be disclaimed
If missing: Refused admission; TSCA penalties
https://www.epa.gov/tsca-import-export-requirements/tsca-requirements-importing-chemicals · Verification H
| A | B | Relation | Rule | Basis |
|---|---|---|---|---|
| FL301 | BASE | stack | Additive to Column 1; EU/TW net-of-MFN to 10%, JP/KR/CH to 12.5% | HTSUS Rev.21 note 52(a), 52(k) |
| FL301 | CN301 | stack | Stacks with China 301 | note 52(a) |
| FL301 | S232 | exempt_b | Goods entered under the listed 232 headings are exempt from FL-301 (9903.05.90); UAS 232 and polysilicon 232 are not in note 52(f) → FL-301 still applies (TBD_) | note 52(f)(1)–(8); Sec232_Carveout table |
| FL301 | FTA | note | Preference claims do not exempt, except USMCA duty-free (9903.05.93/.94) and CAFTA-DR textiles (9903.05.95) | note 52(a), (g)–(i) |
| FL301 | CH98 | note | Chapter 98 exempt except 9802.00.40/.50/.60 (value of repairs) and 9802.00.80 (value less U.S. content) | note 52(a) |
| CN301 | BASE | stack | Additive to Column 1 | note 20(a)/(c)/(e)/(g)/(r); note 31(a) |
| CN301 | S232 | stack | Stacks: neither 301 nor 232 exempts the other for China | note 20 / 31; the 232 proclamations |
| CN301 | FTA | note | Preference claims do not exempt | note 20 / note 31(a) |
| CN301 | CH98 | note | Chapter 98 exempt except 9802.00.40/.50/.60/.80 | note 20 paragraphs / note 31(a) |
| CN301 | CN301 | note | Four-year-review products removed from note 20 lists (no double 25%); chassis and STS cranes stack with maritime 301 from 2026-11-10 | Rev.21 note 20 / 31 comparison; note 31(k)/(l) |
| S232 | BASE | stack | Additive on full customs value; cap headings mean Column 1 + 232 = 15%/10% in total | note 16 / 33 / 37 / 40 / 43 heading text |
| S232 | S232 | note | Precedence: semis > autos/MHDV > metals; auto/MHDV parts not subject to wood 232; wood and metals can stack; civil aircraft (GB/JP/TW) exempt from metals derivatives; pharma/UAS/polysilicon have no cross-232 exclusion | 232 overview table, "stacking" column; notes 16(m), 33, 38, 39 |
| S232 | FTA | note | Preferences do not exempt; USMCA content-based headings for derivative steel and vehicles | note 16(g); note 33(d); note 38 |
| S232 | CH98 | tbd | Chapter 98 treatment varies by proclamation; not verified line by line (TBD_) | — · TBD_ |
Compiled from the HTSUS, the Federal Register, CBP CSMS messages and ACE reports as a classification and compliance reference, not legal advice; file according to current CBP/ACE guidance.